19
INS
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1.12 TABLES OF RESISTANCE FACTORS AND EQUIVALENT LENGTHS OF “GREEN RANGE” FLUE
SYSTEM COMPONENTS
TYPE OF DUCT
Resistance
factor
(R)
Equivalent
length
in m of concentric
pipe Ø 80/125
Concentric pipe 80/125 Ø m 1
5,9
1
90° concentric bend 80/125 Ø
8,4
1,4
Concentric bend 45° Ø 80/125
5,9
1
Terminal complete with concentric horizontal intake-exhaust
Ø 80/125
7,8
1,3
Terminal complete with concentric vertical intake-exhaust
Ø 80/125
10,1
1,7
90° concentric bend Ø 80/125 with inspection
9,5
1,6
Stub pipe with inspection Ø 80/125
9,5
1,6